Study of Enterprise Equipment Maintenance Management Integrated Information System Based on B/S

Equipment maintenance management integrated information system is an important constituent part of enterprise IMS (Intelligent Manufacture System). The system should make the best of all kinds of information sources around the enterprise, and meet the demand for agile production. This paper presents an implementation scheme of Integrated Equipment Maintenance Management Information System Based on Internet/Intranet and gives component division scheme of each tier. This scheme adopts a three-tiers mode of B/S (Browser/Server) and software programming module based on software reusing technology. This makes the system integrated and open, makes maintenance and updating convenient, and largely increases software safety and reusability.

Design of Distributed Authentication Mechanism for Equipment Support Information Network

Considering the secure authentication problem for equipment support information network,a clustering method based on the business information flow is proposed. Based on the proposed method,a cluster-based distributed authentication mechanism and an optimal design method for distributed certificate authority( CA)are designed. Compared with some conventional clustering methods for network,the proposed clustering method considers the business information flow of the network and the task of the network nodes,which can decrease the communication spending between the clusters and improve the network efficiency effectively. The identity authentication protocols between the nodes in the same cluster and in different clusters are designed. From the perspective of the security of network and the availability of distributed authentication service,the definition of the secure service success rate of distributed CA is given and it is taken as the aim of the optimal design for distributed CA. The efficiency of providing the distributed certificate service successfully by the distributed CA is taken as the constraint condition of the optimal design for distributed CA. The determination method for the optimal value of the threshold is investigated. The proposed method can provide references for the optimal design for distributed CA.

Managers and Information Society： A Croatian Experience

In modem society information has become one of the most important resources, playing a crucial role in everyday life. As a result, information technology （IT） is now an indispensable tool in the business world, which has a direct impact on company competitiveness and performance. With all the changes in business environment there is also a dramatic shift in the way the management functions. In order to efficiently perform their tasks and thus rise up to the challenges of the information society, managers need not only to master appropriate IT skills, but also to understand the processes launched by the information revolution. The aim of this paper was to determine the extent to which Croatian managers are prepared for the information society. In addition to the data regarding the level of IT equipment at managers＇ disposal, the paper presents the results on computer usage, self-assessment of IT competencies, and the level of acceptance of modern technologies. Although satisfactory attainment has been recorded in some areas, the results of the analysis reveal that additional effort should be devoted to further improve computer and information literacy of Croatian managers.